Misc: what does a frog close when it swallows?

Questions

What composer at age 44 became tragically insane and was confined to anasylum ?

What composer had a daughter named Chouchou to whom he dedicated the Children's Corner suite ?

Who said "a master of the art is gone, a greater arises in Brahms" ?

Who studied under and married the daughter of Friedrich Wieck ?

What instrument did Johannes Brahms' father play ?